A prequel to Breaking Bad, Better Call Saul charts the misadventures of Jimmy McGill aka Saul Goodman. Bob Odenkirk plays Jimmy, a small-time con-man turned ethically challenged lawyer. Jimmy's endless scheming put him in hot water in season 3, leading ultimately to a confrontation with his brother and nemesis Chuck (Michael McKean). The season ended on a tragic note as a broken Chuck, afflicted again with crippling sensitivity to electronic devices, set fire to his own house with himself inside. Season 4 will no doubt explore the fall-out from Chuck's demise and Jimmy's sense of guilt over the same.

Better Call Saul initially shied away from direct links with Breaking Bad. However, as the series has progressed, more characters from the original show have made appearances. Last year, Breaking Bad super-villain Gus Fring (Giancarlo Esposito) arrived, meeting up with his future lieutenant Mike Ehrmantraut (Jonathan Banks). Season 4 should see more interaction between Fring and Jimmy, as Jimmy creeps ever closer to donning the Saul Goodman persona. There's also the possibility of more Breaking Bad characters popping up on the show. Could season 4 even see an appearance from Walter White himself?

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Season 4 also will no doubt address Jimmy's ever-fascinating relationship with girlfriend/colleague Kim Wexler (Rhea Seehorn). The end of season 3 saw Kim at a personal crossroads. How long will scrupulous Kim continue enduring Jimmy's crossing of ethical boundaries? After the blow of Chuck's death, Kim leaving Jimmy would represent a crushing double-whammy. The show has thus far held off on unleashing Jimmy's inner-Saul. But sooner or later, Better Call Saul must pay off its long-game and show Jimmy giving in to his shadiest urges. Though Odenkirk certainly has done a good job showing the character's other shadings, including his essential sweetness and decency, fans are surely ready for a true taste of Breaking Bad's uber-sleazoid lawyer.